Saddle-post and handle-bar adjusting mechanism



(No Model.)

S. F. ESTELL. v SADDLE POST AND HANDLE BAR ADJUSTING MECHANISM.

Patented Nov. 9, 1897.

b msexfion. a! (51m UNITED STATES PATENT OFFICE.

SAMUEL F. ESTELL, OF CHICAGO, ILLINOIS.

SADDLE-POST AND HANDLE-BAR ADJUSTING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 593,373, dated November9, 1897.

Application filed November 6, 1896. Serial No. 611,202. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL F. ESTELL, of Chicago, countyof Cook, andState of Illinois, have invented new and useful Improvements inSaddle-Post and Handle-Bar Adjusting Mechanism, of which the followingis a full and complete description, reference being had to theaccompanying drawings, which form a part of this specification.

The object of my invention is to provide such mechanism as will dispensewith the wrench and the difficulties attending that method ofadjustment, and that will insure ready and easy means of removal orchange in position of the parts referred to and also insure permanencyof position, and this in a comparatively inexpensive manner.

lVith reference to the drawings, Figure 1 is a section of the frame of abicycle in perspective, showing the saddle-post with adjustingmechanism. Fig. 2 is a vertical section of Fig. 1. Fig. 3 is atransverse section through Fig. 1 on line so a: of Fig. 2. Fig. 4 is avertical section of the head of a frame embracing the handle-bar andstem and adj usting mechanism.

In Figs. 1, 2, and 3, A represents the saddle-post, B the saddle-posttube, and O O the rear frame-braces. The ordinary mechanism in use forclamping the post is suitable, with but little preparation, fortheapplication of my improvements.- As shown, the clamping post and boltat the head of tubeB are of ordinary construction. To accommodate theposts to my improvements, I cut down from the top a slotted opening inthe rear of tube B and corresponding in position to the space betweenthe ears or lugs of the ordinary clamping device B. A cam-lever a ofsuitable thickness is mounted upon the (ordinarily) clamping-bolt b, thecircular or eccentric portion of which is by reason of the slottedprovision in the tube adapted to bear against post A. The eccentricityof cam a is such that a downward movement of post A tends to effectlooking or fastening of the latter. To insure certain and ready actionof the cam, I provide a spring d at the lower portion of its power end.To look the cam firmly against the post A, a screw 6, inserted through athreaded aperture in the arm of cam a, is employed. The screw, asapparent by contact of its end against tube B, (special provision forsuch contact, as shown, being made,) serves to force the power end ofthe cam outward and thereby insure such contact of cam and post as willprevent the latter from being lifted until released.

In reference to the application of my improvement to the hand-bar, asshown in Fig. 4, A represents the stem of the handle-bar, and B theheadof the frame. A nut F is screwed upon the upper end of thesteeringstem and has an upwardly-projecting flange f, which is open atthe rearward side. An ordinary band-clamp E, of the same form as theclamp B, encircles the flange f and carries between its lugs theeccentric a,which is adapted to bear against the handle-bar stem A andbind it against the flange f. The form of the eccentric is the same asthat shown in Figs. 1, 2, and 3, and the thumb-screw e reacts againstthe nut F. The post A, otherwise cylindrical, is shown faced adjacentthe can]. for the accommodation of the latter, and in this exampletransversely channeled, as affording greater security against slipping.The plain face is, however, sufficient.

Having thus fully described my said invention, what I claim, and desireto secure by Letters Patent, is I 1. The combination with a tube and apost telescopically entering the tube, of an eccentric rotatably mountedto bear against the post to prevent its movement in one direction, andan adjustable stop to prevent the rotation of the eccentric in theopposite direction.

2. The combination with a tube and a post telescopically entering thetube, of an eccentric rotatably mounted to bear against the post toprevent its movement in one direction, a hand-lever projecting from theeccentric, a set-screw passing transversely through the lever andadapted to be turned forwardly so as to bear upon a fixed part when theeccentric is in engagement with the post.

3. In a post-adjusting mechanism for saddle or handle-bar, thecombination with the tube, post and clamping mechanism, of a camleverand a spring-for actuating said cam-le- Ver, all substantially as andfor the purpose set forth. r

4. The combination of post A, tube B and bolt 1), with cam a, screw e,and spring d, substantially as and for the purpose specified.

- SAMUEL F. ESTELL.

Witnesses:

GEO. D. KEEFER, W. S. EsTELL.

